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Posted by on Monday, December 13, 2010 at 11:19pm.

perhaps you can shed some light on this
I seem to have a "mental block" here.

http://www.jiskha.com/display.cgi?id=1292296754

  • MathMate - look at this - , Tuesday, December 14, 2010 at 8:13am

    Yeah, it was a nice little puzzle.

    I would have left it as 9x/(2π) which is normal practice for maths answers. I responded in detail at the original post.

  • MathMate - look at this - , Tuesday, December 14, 2010 at 1:29pm

    ok, arclength of course!

    For some reason I had the wheel rotating and was looking for the up-down motion similar to a ferris-wheel.
    thanks.

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